1 /*
2  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "telescope.h"
18 
19 #include <stdlib.h>
20 
21 static void	*hash_alloc(size_t, void*);
22 static void	*hash_calloc(size_t, size_t, void*);
23 static void	 hash_free(void*, void*);
24 
25 static void *
26 hash_alloc(size_t len, void *d)
27 {
28 	if ((d = malloc(len)) == NULL)
29 		abort();
30 	return d;
31 }
32 
33 static void *
34 hash_calloc(size_t nmemb, size_t size, void *d)
35 {
36 	if ((d = calloc(nmemb, size)) == NULL)
37 		abort();
38 	return d;
39 }
40 
41 static void
42 hash_free(void *ptr, void *d)
43 {
44 	free(ptr);
45 }
46 
47 void
48 telescope_ohash_init(struct ohash *h, unsigned int sz, ptrdiff_t ko)
49 {
50 	struct ohash_info info = {
51 		.key_offset = ko,
52 		.calloc = hash_calloc,
53 		.free = hash_free,
54 		.alloc = hash_alloc,
55 	};
56 
57 	ohash_init(h, sz, &info);
58 }
59 
60 struct tofu_entry *
61 telescope_lookup_tofu(struct ohash *h, const char *domain)
62 {
63 	unsigned int	slot;
64 
65 	slot = ohash_qlookup(h, domain);
66 	return ohash_find(h, slot);
67 }
68 
69 void
70 telescope_ohash_insert(struct ohash *h, struct tofu_entry *e)
71 {
72 	unsigned int	slot;
73 
74 	slot = ohash_qlookup(h, e->domain);
75 	ohash_insert(h, slot, e);
76 }